What is the cheapest airline that flies from Louisville Intl to Sydney Kingsford Smith?

United Airlines is the most popular carrier operating from Louisville Intl to Sydney Kingsford Smith

What airlines fly to Sydney?

Qantas Airways, United Airlines and American Airlines are the top three most popular airlines that fly to Sydney from Louisville according to our data. Qantas Airways is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 5 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport?

Prices for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport?

There are 2 operators available for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport as of September 2026.

How old do you have to be to fly from Louisville Intl Airport to Sydney Kingsford Smith Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to Sydney Kingsford Smith Airport.

What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$645 Cheap Flights from Louisville to Sydney in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to Sydney

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One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:10 am - 7:00 amSDF Louisville Intl-SYD Sydney Kingsford Smith

29h 50m1 stop Houston George Bush Intcntl

9:15 am - 9:58 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

28h 43m1 stop Houston George Bush Intcntl

$1,238United Airlines

Wed, Nov 11 - Wed, Nov 18

3:24 pm - 9:05 amSDF Louisville Intl-SYD Sydney Kingsford Smith

25h 41m2 stops Denver Intl Los Angeles

9:15 am - 1:23 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

20h 08m1 stop Houston George Bush Intcntl

$1,238United Airlines

Wed, Nov 11 - Wed, Nov 18

3:24 pm - 9:20 amSDF Louisville Intl-SYD Sydney Kingsford Smith

25h 56m2 stops Denver Intl San Francisco

11:20 am - 6:32 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

23h 12m2 stops Los Angeles Chicago O'Hare Intl

$1,242United Airlines

Wed, Nov 11 - Wed, Nov 18

3:26 pm - 8:30 amSDF Louisville Intl-SYD Sydney Kingsford Smith

25h 04m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:40 am - 9:13 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

26h 33m2 stops Los Angeles Detroit Metropolitan Wayne County

$1,294Delta

Sun, Nov 8 - Sun, Nov 15

3:24 pm - 9:20 amSDF Louisville Intl-SYD Sydney Kingsford Smith

25h 56m2 stops Denver Intl San Francisco

9:15 am - 1:23 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

20h 08m1 stop Houston George Bush Intcntl

$1,399United Airlines

Sun, Nov 8 - Sun, Nov 15

6:29 am - 8:50 pmSDF Louisville Intl-SYD Sydney Kingsford Smith

46h 21m2 stops Chicago O'Hare Intl Hong Kong Intl

8:40 am - 11:35 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

29h 55m2 stops Hong Kong Intl Dallas/Fort Worth

$1,524Multiple Airlines

Mon, Mar 1 - Mon, Mar 29

3:50 pm - 8:35 amSDF Louisville Intl-SYD Sydney Kingsford Smith

24h 45m2 stops Houston George Bush Intcntl Auckland Intl

11:20 am - 2:27 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

42h 07m1 stop San Francisco

$1,545Air New Zealand

Mon, Mar 1 - Mon, Mar 29

10:26 am - 3:30 pmSDF Louisville Intl-SYD Sydney Kingsford Smith

37h 04m3 stops Chicago O'Hare Intl Hong Kong Intl Melbourne

10:20 pm - 9:35 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

38h 15m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,547Multiple Airlines

Mon, Mar 1 - Mon, Mar 29

1:59 pm - 7:50 amSDF Louisville Intl-SYD Sydney Kingsford Smith

26h 51m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:15 am - 9:13 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

25h 58m2 stops Los Angeles Detroit Metropolitan Wayne County

$1,562Delta

Mon, Oct 12 - Fri, Oct 16

1:59 pm - 7:50 amSDF Louisville Intl-SYD Sydney Kingsford Smith

26h 51m2 stops Atlanta Hartsfield-Jackson Los Angeles

10:15 am - 9:38 pmSYD Sydney Kingsford Smith-SDF Louisville Intl

26h 23m2 stops Los Angeles Atlanta Hartsfield-Jackson

$1,562Delta

Mon, Oct 12 - Sat, Oct 17

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United Airlines flights from Louisville to Sydney

Our best United Airlines deals on Louisville to Sydney flight tickets

United Airlines

Nov 11

SDF3:24 pmLouisville Intl

25h 41m

2 stops

SYD9:05 amSydney Kingsford Smith

Nov 18

SYD9:15 amSydney Kingsford Smith

20h 08m

1 stop

SDF1:23 pmLouisville Intl

$1,238

United Airlines

Nov 11

SDF3:24 pmLouisville Intl

25h 56m

2 stops

SYD9:20 amSydney Kingsford Smith

Nov 18

SYD11:20 amSydney Kingsford Smith

23h 12m

2 stops

SDF6:32 pmLouisville Intl

$1,242

United Airlines

Nov 8

SDF3:24 pmLouisville Intl

25h 56m

2 stops

SYD9:20 amSydney Kingsford Smith

Nov 15

SYD9:15 amSydney Kingsford Smith

20h 08m

1 stop

SDF1:23 pmLouisville Intl

$1,399

Delta flights from Louisville to Sydney

Our best Delta deals on Louisville to Sydney flight tickets

Delta

Nov 8

SDF3:26 pmLouisville Intl

25h 04m

2 stops

SYD8:30 amSydney Kingsford Smith

Nov 15

SYD10:40 amSydney Kingsford Smith

26h 33m

2 stops

SDF9:13 pmLouisville Intl

$1,294

Delta

Oct 12

SDF1:59 pmLouisville Intl

26h 51m

2 stops

SYD7:50 amSydney Kingsford Smith

Oct 17

SYD10:15 amSydney Kingsford Smith

26h 23m

2 stops

SDF9:38 pmLouisville Intl

$1,562

Delta

Jan 8

SDF5:45 pmLouisville Intl

46h 45m

2 stops

SYD8:30 amSydney Kingsford Smith

Jan 30

SYD10:40 amSydney Kingsford Smith

24h 41m

2 stops

SDF7:21 pmLouisville Intl

$1,792

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Wed 11/11

9:10 am-7:00 am

1 stop29h 50m

Sydney Kingsford Smith

Wed 11/18

9:15 am-9:58 pm

1 stop28h 43m

$1,238

Quickest round-trip

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Wed 11/11

3:24 pm-9:05 am

2 stops25h 41m

Sydney Kingsford Smith

Wed 11/18

9:15 am-1:23 pm

1 stop20h 08m

$1,238

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Wed 11/11

3:24 pm-9:20 am

2 stops25h 56m

Sydney Kingsford Smith

Wed 11/18

11:20 am-6:32 pm

2 stops23h 12m

$1,242

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Sun 11/8

3:26 pm-8:30 am

2 stops25h 04m

Sydney Kingsford Smith

Sun 11/15

10:40 am-9:13 pm

2 stops26h 33m

$1,294

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Sun 11/8

3:24 pm-9:20 am

2 stops25h 56m

Sydney Kingsford Smith

Sun 11/15

9:15 am-1:23 pm

1 stop20h 08m

$1,399

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Mon 3/1

6:29 am-8:50 pm

2 stops46h 21m

Sydney Kingsford Smith

Mon 3/29

8:40 am-11:35 pm

2 stops29h 55m

$1,524

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Mon 3/1

3:50 pm-8:35 am

2 stops24h 45m

Sydney Kingsford Smith

Mon 3/29

11:20 am-2:27 pm

1 stop42h 07m

$1,545

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Mon 3/1

10:26 am-3:30 pm

3 stops37h 04m

Sydney Kingsford Smith

Mon 3/29

10:20 pm-9:35 pm

2 stops38h 15m

$1,547

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Mon 10/12

1:59 pm-7:50 am

2 stops26h 51m

Sydney Kingsford Smith

Fri 10/16

10:15 am-9:13 pm

2 stops25h 58m

$1,562

LouisvilleSydney

SDF Louisville Intl - SYD Sydney Kingsford Smith

SDFSYD

Louisville Intl

Mon 10/12

1:59 pm-7:50 am

2 stops26h 51m

Sydney Kingsford Smith

Sat 10/17

10:15 am-9:38 pm

2 stops26h 23m

$1,562

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Louisville to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Sydney?

In general, January is the cheapest month to fly from Louisville to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Sydney during the month of January, then departing from Louisville during the month August is also very affordable. Most momondo users find prices during this month for around $1,191.

Can stopping save me money on Louisville to Sydney flights?

You could potentially save up to 7% on your flight if you consider stops on a Louisville to Sydney flight.

When to book flights from Louisville to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Louisville to Sydney according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Louisville to Sydney (SDF to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to Sydney

Best Price Found	$645
Fastest flight time	25h 04m
Direct flights	None

The best one-way flight to Sydney from Louisville in the past 72 hours is $645. The best round-trip flight deal from Louisville to Sydney found on momondo in the last 72 hours is $1,238.

The fastest flight from Louisville to Sydney takes 25h 04m

There are no direct flights from Louisville to Sydney. There are no popular flight routes from Louisville to Sydney.

Search flight deals

Frequently asked questions about flying from Louisville to Sydney

How far is Louisville Intl to Sydney Kingsford Smith by plane?
A flight from Louisville Intl to Sydney Kingsford Smith will travel around 9284.6 mi. A reasonable flight in good conditions will take 25h 04m.
When did momondo last update prices for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport?
Prices for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport?
There are 2 operators available for flights from Louisville Intl Airport to Sydney Kingsford Smith Airport as of September 2026.
How old do you have to be to fly from Louisville Intl Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Louisville to Sydney?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Louisville to Sydney is United Airlines (62% of total bookings). The next most popular airline is Delta (38%).

Best airlines flying from Louisville to Sydney

Compare and see reviews for airlines that fly from Louisville to Sydney with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $1,140	Free Cancellation	Rating 7.8 8,608 reviews		Search Delta flights
United Airlines	PriceFrom $1,230	Free Cancellation	Rating 7.4 10,248 reviews		Search United Airlines flights

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Katoomba

Coogee

Leura

Randwick

Cronulla

Manly

Terrigal

Lithgow

Charlestown

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Louisville to Sydney for you.

Can I find flights from Louisville to Sydney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Louisville to Sydney flights to just show those with flexible booking policies.

How can momondo help me find flights from Louisville to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Louisville. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Louisville to Sydney right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Louisville to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.

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Cheap flights from Louisville to Sydney from $645

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to Sydney departing on 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Louisville to Sydney

Our best United Airlines deals on Louisville to Sydney flight tickets

Delta flights from Louisville to Sydney

Our best Delta deals on Louisville to Sydney flight tickets

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How to get the cheapest flight ticket from Louisville to Sydney

What is the cheapest month to fly to Sydney?

Can stopping save me money on Louisville to Sydney flights?

What is the cheapest airline that flies from Louisville Intl to Sydney Kingsford Smith?

What airlines fly to Sydney?

When to book flights from Louisville to Sydney

Cheap Louisville to Sydney (SDF to SYD) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Louisville to Sydney

Best airlines flying from Louisville to Sydney

Compare and see reviews for airlines that fly from Louisville to Sydney with momondo

Traveling to a place near Sydney?

Why use momondo?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Australia

Airports servicing New South Wales

Fly your favorite airline to Sydney

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Sydney

List of cabin classes available on flights landing in Sydney. Availability may vary depending on flight origin and airline.

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